Dark Screen

>

>

>

Hello, I really need some help.
When I copied and switched Call Of Duty folders to make Veritas 2.03 work, my game screen got MUCH darker in the new version. You can NOT change or make it normal with brightness. It doesn't change brightness, no matter how you set it. I have had this problem already years ago!

What can I do? What was the trick to make the brightness of your screen normal?